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9 pin D-SUB male connector layout
9 pin D-SUB male connector
at the UPS
9 pin D-SUB female connector layout
9 pin D-SUB female connector
at the PC
Used for connecting Megatech inteligent UPS (type I) or smart UPS (type II) to PC
PC
Pin name		 PC
Pin		 Direction UPS
Pin		 UPS
Pin name		 Description
NC 1 1 NC  
AC Power Failuce 2 2 AC Power Failuce Active negative level (negative impulse indicates a power failure)
NC 3 3 NC  
Common Ground of Pin 2, 5, 6 4 <> 4 Common Ground of Pin 2, 5, 6  
UPS Battery Low 5 5 UPS Battery Low Active negative level (negative impulse indicates a batery low power level)
Turn Off UPS 6 6 Turn Off UPS Active positive level (positive impulse sent by PC shuts down the UPS)
NC / GND for pin 6 7 <> 7 NC / GND for pin 6 NC in Type I cable. GND for pin 6 in Type II cable.
NC 8 8 NC  
NC 9 9 NC  
 
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